I’m looking at a new-to-me 2009 GMC sierra 1500. Everything looks good but my current 2004 vehicle has no where near the amount of rust I can easily see on the frame of this truck. No rust on the body and all wires I checked looked OK. The previous owner lived in Rhode Island, I’m assuming by the shore. Is this likely to be a problem in the long term (ie truck falling apart in 10 years due to rust)? Pics attached. The salesman says “It’s just surface rust” when asked about it.